Current research on indoor localization and navigation in changing environment?
I would start with:


PoseNet: A Convolutional Network for Real-Time 6-DOF Camera Relocalization
VidLoc: A Deep Spatio-Temporal Model for 6-DoF Video-Clip Relocalization
Image-based localization using LSTMs for structured feature correlation
Image-based Localization using Hourglass Networks
UAN: Unified Attention Network for Convolutional Neural Networks
Scene Coordinate and Correspondence Learning for Image-Based
Localization


You can also search for articles using the 7-scenes dataset (Scene Coordinate Regression Forests for Camera Relocalization in RGB-D Images) which is pretty standard